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The winter-related events were responsible for at least 358 fatalities, making it the deadliest season since 1992–93. A La Niña pattern influenced much of the winter in North America. Based on the astronomical definition, winter began at the winter solstice on December 21, 2020 and ended at the spring equinox on March 20, 2021. [1]
The 2020–2023 La Niña event was a rare three-year, triple-dip La Niña. [1] The impact of the event led to numerous natural disasters that were either sparked or fueled by La Niña. La Niña refers to the reduction in the temperature of the ocean surface across the central and eastern equatorial Pacific, accompanied by notable changes in the ...
For context, La Niña usually brings wetter-than-average winter conditions to the Pacific Northwest and Ohio Valley, while the nation's southern tier tends to skew drier. la_nina_pattern_precip.png
A weak La Niña is less likely to have a significant impact on weather patterns during the winter and spring. A typical La Niña pattern would usually bring an overall wetter, cooler winter to the ...
The latest forecast from the Climate Prediction Center – issued Thursday – shows many of the hallmarks of typical La Niña winters and is consistent with the center’s earlier forecasts. But ...
However, forecasters said La Niña conditions are still most likely to emerge by January 2025 (59% chance), with a transition to "ENSO-neutral" most likely by March-May 2025 (61% chance).
Just recently Earth experienced a “triple-dip” La Nina event from 2020 to 2023. “We had three back to back winters where we had La Nina conditions, which was unusual because the only other case of that happening was back in 1973 to 1976,” said Michelle L’Heureux, a climate scientist at NOAA.
In Canada, La Niña will, in general, cause a cooler, snowier winter, such as the near-record-breaking amounts of snow recorded in the La Niña winter of 2007–2008 in eastern Canada. [200] [201] In the spring of 2022, La Niña caused above-average precipitation and below-average temperatures in the state of Oregon.